This happens commonly in repeated heart attacks where each attacks kills off some amount of muscles. It also occurs in prolonged untreated high blood pressure.
Patient will experience swelling of the legs. Sometimes it may extend to the thigh or abdomen. There will be breathlessness either with just a little walking or even at rest. They may experience breathlessness when lying down or in the middle of the night.
The symptoms can be relatively easily treated with medicines. The more important issue is to discover the cause of this condition and treat it so as not to propagate or worsens the heart failure.